package arithmetic1.test1;

import java.util.Scanner;

public class D {
    public static void main(String[] args) {
        Scanner scanner=new Scanner(System.in);
        int num=scanner.nextInt();
        if(num<2 || num>20){
            throw new RuntimeException("请输入2-20之间的数");
        }
        for(int i=1;i<=num;i++){
            for(int j=0;j<i-1;j++){
                System.out.print(" ");
            }
            System.out.println("*");
        }
    }
}
